Standard & Poor's Ratings Services also cautioned about possible over-investment led by the credit expansion.

"China's heavy dependence on fixed capital-led growth magnifies its economic sensitivity to a correction in investments," said S&P credit analyst Terry Chan.

"As fixed capital becomes less productive, the high growth rates of investment in China may be harder to sustain. Such a potential drop could have a significant impact on China's GDP growth," Chan added.

Chu Jianfang, chief economist with Citic Securities, said the larger-than-expected new financing in January was partly a seasonal result of Spring Festival, and was also caused by the lower interest rates amid an easing environment.

The inter-bank borrowing rate, a benchmark interest rate, was at 2.27 percent in January, 0.34 percentage points lower than in the previous month.

If the fast-growing credit supply momentum is maintained, the expanding total new financing will result in the economy overheating, Chu said.

"We estimate that the government will adopt tougher controls on new financing," he added.

On Thursday, the central bank launched measures to withdraw liquidity from the market - for the first time in eight months - raising speculation that it will tighten credit supply.

"Considering the inflationary pressure and the rebound in housing prices, we don't expect the easing environment to last for long, and the policy stance will be more stringent in the future," Chu said.

Contact the writer at weitian@chinadaily.com.cn